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Oracle PL/SQL/System Tables Views/user indexes - История изменений
2026-04-06T15:20:56Z
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в 13:45, 26 мая 2010
2010-05-26T13:45:19Z
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Admin: 1 версия
2010-05-26T10:01:25Z
<p>1 версия</p>
<p><b>Новая страница</b></p><div>==Check query in user_indexes after creation==<br />
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<!-- start source code --><br />
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<source lang="sql"><br />
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SQL><br />
SQL> create table emp(<br />
2 emp_id integer primary key<br />
3 ,lastname varchar2(20) not null<br />
4 ,firstname varchar2(15) not null<br />
5 ,midinit varchar2(1)<br />
6 ,street varchar2(30)<br />
7 ,city varchar2(20)<br />
8 ,state varchar2(2)<br />
9 ,zip varchar2(5)<br />
10 ,shortZipCode varchar2(4)<br />
11 ,area_code varchar2(3)<br />
12 ,phone varchar2(8)<br />
13 ,company_name varchar2(50));<br />
Table created.<br />
SQL><br />
SQL><br />
SQL> create index emp_2_idx_phone on emp (phone);<br />
Index created.<br />
SQL><br />
SQL> select index_name, table_name, uniqueness<br />
2 from user_indexes<br />
3 where index_name = "EMP_2_IDX_PHONE";<br />
SQL><br />
SQL> drop table emp;<br />
Table dropped.<br />
SQL><br />
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</source><br />
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==Did the command create index statistics?==<br />
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<!-- start source code --><br />
<br />
<source lang="sql"><br />
<br />
SQL><br />
SQL> SELECT index_name<br />
2 FROM user_indexes<br />
3 WHERE last_analyzed IS NULL;<br />
<br />
INDEX_NAME<br />
------------------------------<br />
SYS_C004799<br />
SYS_C008156<br />
HD_CLUSTER_INDEX<br />
3 rows selected.<br />
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</source></div>
Admin